The 33-year-old billionaire has come under fire for mishandling the personal info of millions of Facebook users

The cash-splashing was revealed in a filing with US regulators.

The document details how Zuck jets around in private planes and has a team of dedicated security bods.

Facebook doesn't reveal exactly what risks the 33-year-old faces, but says that the costs are "necessary".

"We paid for the initial procurement, installation and maintenance of security measures for Mr Zuckerberg's personal residences, and we pay for the annual costs of security personnel," the document reads.

"On certain occasions, Mr Zuckerberg may be accompanied by guests when using private aircraft."

Facebook is currently caught up in a scandal after giving away personal info on 87million users without their permission.

The company has come under fire for profiting from user data, helping make Zuck the 5th richest person on the planet.

The Harvard drop-out is currently worth £46.1billion, and his fortune keeps growing.

Part of Facebook's major cash hoard is spent funding lavish plane trips.

Facebook CEO Mark Zuckerberg grilled by US Congress over data misuse in a marathon five-hour hearing

In 2017, Facebook spent more than £1million on travel aboard private jets.

And since 2015, Facebook has spent around £14million on security and private planes on Zuckerberg alone.

"Our compensation and governance committee has authorised an 'overall security program' for Mr Zuckerberg to address safety concerns due to specific threats to his safety arising directly as a result of his position as our founder," writes Facebook, justifying the cost.

"We require these security measures for the company's benefit because of the importance of Mr Zuckerberg to Facebook, and we believe that the costs of this overall security program are appropriate and necessary."

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